Two possible causes come to mind:
Be certain before adding e-liquid to your clearomizer that the coil head is snuggly screwed into the base/ I've seen new clearomizers with the coil head just loose inside the tank, allowing liquid to leak because there is no seal/
Clearomizers have relatively small coils/ Drawing too hard can allow more e-liquid to be drawn to the coil than can be vaporized into vapor; the leftover e-liquid has no place to go but the air chamber, resulting in a gurgling sound and e-liquid into your mouth or fall down to the top of the battery/
vaping technique is different than smoking technique -- use a longer, gentler, draw technique which will allow the coil(s) time to vaporize the e-liquid you suck to them/